<script setup lang="ts">
import {
  deleteMemberCartAPI,
  getMemberCartAPI,
  putMemberCartBySkuIdAPI,
  putMemberCartSelectedAPI,
} from '@/services/cart'
import { useMemberStore } from '@/stores'
import type { CartItem } from '@/types/cart'
import type { XtxGuessInstance } from '@/types/component'
import { onShow } from '@dcloudio/uni-app'
import { computed, ref } from 'vue'

// 页面底部安全区域适配(tabBar页面底部的导航栏已经默认适配,无需处理)
const safeAreaBottom = ref(0)
const props = withDefaults(
  defineProps<{
    isTabBar?: boolean
  }>(),
  {
    isTabBar: true,
  },
)
if (!props.isTabBar) {
  // 非tabBar页面需要适配底部安全区域
  const { safeAreaInsets } = uni.getWindowInfo()
  safeAreaBottom.value = safeAreaInsets?.bottom || 0
}

const store = useMemberStore()

// 猜你喜欢
const guessRef = ref<XtxGuessInstance>()
const getMore = () => {
  guessRef.value?.getMore()
}

// 获取购物车列表
const cartList = ref([] as CartItem[])
const getMemberCart = async () => {
  const res = await getMemberCartAPI()
  cartList.value = res.result
  console.log()
}

// 删除购物车商品
const onDeleteCartById = (sku_id: string) => {
  uni.showModal({
    title: '提示',
    content: '确认删除该商品吗？',
    success: async (res) => {
      if (res.confirm) {
        await deleteMemberCartAPI({ ids: [sku_id] })
        uni.showToast({
          title: '删除成功',
          icon: 'success',
        })

        getMemberCart()
      }
    },
  })
}

// 商品数量变化
const onGoodsNumberChange = async (value: number, skuId: string) => {
  console.log('商品数量变化:', value, skuId)
  await putMemberCartBySkuIdAPI(skuId, { count: value })
}

// 商品选中状态变化
const onselectCartItem = async (item: CartItem) => {
  item.selected = !item.selected
  await putMemberCartBySkuIdAPI(item.skuId, { selected: item.selected })
}

// 全选与反选
const selectedAll = computed(() => {
  return cartList.value.length && cartList.value.every((item) => item.selected)
})
const onSelectAll = async () => {
  const _selectedAll = !selectedAll.value
  await putMemberCartSelectedAPI({ selected: _selectedAll })
  cartList.value.forEach((item) => {
    item.selected = _selectedAll
  })
}

// 选中的购物车商品
const selectedCartItems = computed(() => {
  return cartList.value && cartList.value.filter((item) => item.selected)
})
// 购物车商品总价
const totalAmount = computed(() => {
  return selectedCartItems.value
    .reduce((total, item) => {
      return total + item.nowPrice * item.count
    }, 0)
    .toFixed(2)
})
// 购物车选中商品件数
const selectedCartItemsCount = computed(() => {
  return selectedCartItems.value.reduce((total, item) => {
    return total + item.count
  }, 0)
})
// 计算
const gotoPayment = () => {
  if (selectedCartItems.value.length === 0) {
    return uni.showToast({
      title: '请选择商品',
      icon: 'none',
    })
  }
  uni.navigateTo({
    url: '/pagesOrder/create/create',
  })
}

onShow(() => {
  if (store.profile) {
    getMemberCart()
  }
})
</script>

<template>
  <scroll-view scroll-y class="scroll-view" @scrolltolower="getMore">
    <!-- 已登录: 显示购物车 -->
    <template v-if="store.profile">
      <!-- 购物车列表 -->
      <view class="cart-list" v-if="cartList.length">
        <!-- 优惠提示 -->
        <view class="tips">
          <text class="label">满减</text>
          <text class="desc">满1件, 即可享受9折优惠</text>
        </view>
        <!-- 滑动操作分区 -->
        <uni-swipe-action>
          <!-- 滑动操作项 -->
          <uni-swipe-action-item v-for="item in cartList" :key="item.skuId" class="cart-swipe">
            <!-- 商品信息 -->
            <view class="goods">
              <!-- 选中状态 -->
              <text @tap="onselectCartItem(item)" class="checkbox" :class="{ checked: item.selected }"></text>
              <navigator :url="`/pages/goods/goods?id=${item.id}`" hover-class="none" class="navigator">
                <image mode="aspectFill" class="picture" :src="item.picture"></image>
                <view class="meta">
                  <view class="name ellipsis">{{ item.name }}</view>
                  <view class="attrsText ellipsis">{{ item.attrsText }}</view>
                  <view class="price">{{ item.nowPrice }}</view>
                </view>
              </navigator>
              <!-- 商品数量 -->
              <view class="count">
                <uni-number-box
                  @change="(value) => onGoodsNumberChange(value, item.skuId)"
                  v-model="item.count"
                  :min="1"
                  :max="item.stock"
                />
                <!-- <text class="text">-</text>
                <input class="input" type="number" :value="item.count.toString()" />
                <text class="text">+</text> -->
              </view>
            </view>
            <!-- 右侧删除按钮 -->
            <template #right>
              <view class="cart-swipe-right">
                <button class="button delete-button" @tap="onDeleteCartById(item.skuId)">删除</button>
              </view>
            </template>
          </uni-swipe-action-item>
        </uni-swipe-action>
      </view>
      <!-- 购物车空状态 -->
      <view class="cart-blank" v-else>
        <image src="/static/images/blank_cart.png" class="image" />
        <text class="text">购物车还是空的，快来挑选好货吧</text>
        <navigator open-type="switchTab" url="/pages/index/index" hover-class="none">
          <button class="button">去首页看看</button>
        </navigator>
      </view>
      <!-- 吸底工具栏 -->
      <!-- <view class="toolbar" style="padding-bottom: 34px"> -->
      <view class="toolbar" :style="`padding-bottom:${safeAreaBottom}px`">
        <text @tap="onSelectAll" class="all" :class="{ checked: selectedAll }">全选</text>
        <text class="text">合计:</text>
        <text class="amount">{{ totalAmount }}</text>
        <view class="button-grounp">
          <view @tap="gotoPayment" class="button payment-button" :class="{ disabled: selectedCartItemsCount === 0 }">
            去结算({{ selectedCartItemsCount }})
          </view>
        </view>
      </view>
    </template>
    <!-- 未登录: 提示登录 -->
    <view class="login-blank" v-else>
      <text class="text" user-select>登录后可查看购物车中的商品</text>
      <navigator url="/pages/login/login" hover-class="none">
        <button class="button">去登录</button>
      </navigator>
    </view>
    <!-- 猜你喜欢 -->
    <XtxGuess ref="guessRef"></XtxGuess>
    <!-- 底部占位空盒子 -->
    <view class="toolbar-height"></view>
  </scroll-view>
</template>

<style lang="scss">
// 根元素
:host {
  height: 100vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background-color: #f7f7f8;
}

// 滚动容器
.scroll-view {
  flex: 1;
  background-color: #f7f7f8;
}

// 购物车列表
.cart-list {
  padding: 0 20rpx;

  // 优惠提示
  .tips {
    display: flex;
    align-items: center;
    line-height: 1;
    margin: 30rpx 10rpx;
    font-size: 26rpx;
    color: #666;

    .label {
      color: #fff;
      padding: 7rpx 15rpx 5rpx;
      border-radius: 4rpx;
      font-size: 24rpx;
      background-color: #27ba9b;
      margin-right: 10rpx;
    }
  }

  // 购物车商品
  .goods {
    display: flex;
    padding: 20rpx 20rpx 20rpx 80rpx;
    border-radius: 10rpx;
    background-color: #fff;
    position: relative;

    .navigator {
      display: flex;
    }

    .checkbox {
      position: absolute;
      top: 0;
      left: 0;

      display: flex;
      align-items: center;
      justify-content: center;
      width: 80rpx;
      height: 100%;

      &::before {
        content: '\e6cd';
        font-family: 'erabbit' !important;
        font-size: 40rpx;
        color: #444;
      }

      &.checked::before {
        content: '\e6cc';
        color: #27ba9b;
      }
    }

    .picture {
      width: 170rpx;
      height: 170rpx;
    }

    .meta {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      margin-left: 20rpx;
    }

    .name {
      height: 72rpx;
      font-size: 26rpx;
      color: #444;
    }

    .attrsText {
      line-height: 1.8;
      padding: 0 15rpx;
      font-size: 24rpx;
      align-self: flex-start;
      border-radius: 4rpx;
      color: #888;
      background-color: #f7f7f8;
    }

    .price {
      line-height: 1;
      font-size: 26rpx;
      color: #444;
      margin-bottom: 2rpx;
      color: #cf4444;

      &::before {
        content: '￥';
        font-size: 80%;
      }
    }

    // 商品数量
    .count {
      position: absolute;
      bottom: 20rpx;
      right: 5rpx;

      display: flex;
      justify-content: space-between;
      align-items: center;
      width: 220rpx;
      height: 48rpx;

      .text {
        height: 100%;
        padding: 0 20rpx;
        font-size: 32rpx;
        color: #444;
      }

      .input {
        height: 100%;
        text-align: center;
        border-radius: 4rpx;
        font-size: 24rpx;
        color: #444;
        background-color: #f6f6f6;
      }
    }
  }

  .cart-swipe {
    display: block;
    margin: 20rpx 0;
  }

  .cart-swipe-right {
    display: flex;
    height: 100%;

    .button {
      display: flex;
      justify-content: center;
      align-items: center;
      width: 50px;
      padding: 6px;
      line-height: 1.5;
      color: #fff;
      font-size: 26rpx;
      border-radius: 0;
    }

    .delete-button {
      background-color: #cf4444;
    }
  }
}

// 空状态
.cart-blank,
.login-blank {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-direction: column;
  height: 60vh;
  .image {
    width: 400rpx;
    height: 281rpx;
  }
  .text {
    color: #444;
    font-size: 26rpx;
    margin: 20rpx 0;
  }
  .button {
    width: 240rpx !important;
    height: 60rpx;
    line-height: 60rpx;
    margin-top: 20rpx;
    font-size: 26rpx;
    border-radius: 60rpx;
    color: #fff;
    background-color: #27ba9b;
  }
}

// 吸底工具栏
.toolbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: calc(var(--window-bottom));
  z-index: 1;

  height: 100rpx;
  padding: 0 20rpx;
  display: flex;
  align-items: center;
  border-top: 1rpx solid #ededed;
  border-bottom: 1rpx solid #ededed;
  background-color: #fff;
  box-sizing: content-box;

  .all {
    margin-left: 25rpx;
    font-size: 14px;
    color: #444;
    display: flex;
    align-items: center;
  }

  .all::before {
    font-family: 'erabbit' !important;
    content: '\e6cd';
    font-size: 40rpx;
    margin-right: 8rpx;
  }

  .checked::before {
    content: '\e6cc';
    color: #27ba9b;
  }

  .text {
    margin-right: 8rpx;
    margin-left: 32rpx;
    color: #444;
    font-size: 14px;
  }

  .amount {
    font-size: 20px;
    color: #cf4444;

    .decimal {
      font-size: 12px;
    }

    &::before {
      content: '￥';
      font-size: 12px;
    }
  }

  .button-grounp {
    margin-left: auto;
    display: flex;
    justify-content: space-between;
    text-align: center;
    line-height: 72rpx;
    font-size: 13px;
    color: #fff;

    .button {
      width: 240rpx;
      margin: 0 10rpx;
      border-radius: 72rpx;
    }

    .payment-button {
      background-color: #27ba9b;

      &.disabled {
        opacity: 0.6;
      }
    }
  }
}
// 底部占位空盒子
.toolbar-height {
  height: 100rpx;
}
</style>
